A floating runway
A C-17 Globemaster III aircraft from Joint Base Lewis-McChord, Wash., is parked on the seasonal sea ice runway, Oct. 1, 2012, at McMurdo Station, Antarctica, in support of Operation Deep Freeze. The runway, which is carved into a 100-inch layer of frozen sea water, is created because it is closer to the research center than other existing runways. (U.S. Air Force photo/Staff Sgt. Sean Tobin)